#include <stdio.h>


int main()
{
    char ch[20] = "linux so easy!\n";
    FILE* f = fopen("bite","w");
    fprintf(f,"%s",ch);

    fclose(f);

    FILE* pf = fopen("bite","r");
    char ret[20];
    fgets(ret,sizeof(ret),f);
    printf("%s",ret);

    return 0;
}
